Strainer



Aug. 24, 1948. G. L. MacNEiLL 2,447,952

STRAINER Filed July 4, 1944 2 Sheets-Sheet 1 mavmzzz,

Aug. G MacNEILL STRAINER Filed July 4, 1944 2 Sheets-Sheet 2 Patented Aug. 24, 1948 U N] T E D STATES PATENT O FFIC 1 23141952;

-S.TRAINEB;;}.

George L. MacNeill, Pennsidie', Pa.

Applic'atien-July 4, 1944;. Serial3-Nb.:543',4fi1 fifiiaimsw (Cl.=210:.163.)

This;inventionagenerall. wrelates to mechanical devicesfor straining: liquids-end: mere partic.- ularh, to the type knownr-as :fiduplex strainers; although" certain features of-.-the;-invention are notdimited' to devices of. this specific'tyrpea Onerobjectzof my invention is to provide a -novel strainerunit vfor liquids having; aaplurality ,of strainer. elements through r-which iiqui-d; is di rectedin selectivemanner; andwhich; unit has certain; structural: and-.functionah features of advantage. over. similar. devices. heretofore-availeable for this purpose-w Another object is. to.-.pr.ovide suchav unit embodying' novel features adapted. .to overcome certainediflicultiestheretcforei experienced connectiomwi-ththe manutactureanduse ofthev devices to whichrthe inventionwrelates.

It.isralsman;objectzto provide sucha'unit in which -"the.functioning of the valvev meansinvoives. .-a new. mode 0t operation .eifeoting. free and reasy actuation of the-movable valve membersiitom \onenselective position to-.another; "and a final positive seating action thereoirataeach valveeclosing-pcint.

An additionalvobjectis to provideisuch auni-t in which. theeconstruction Fand .operationnot the valve? means islsuch asrton preclude theepossibility that anyrmaterial, ommatten carriedrby the liquid, will foul-the cooperating parts thereof, thusiassuring.penfectvalve action*at all times.

Another. object -is.wto. provide; such a unit in which. the valve means has. cooperatively asso..- ciatedi'thenewith-ra novel-and-simple-arrangement tor: visually. indicating which .ofi.-the=strainen elermentsis active.

Another robj ect .is to. provide ;such.a [unit-Which combines-.vanious desirable; and. advantageous features suchv as .simplicityof construction .and operation;v compactness, minimum number not top crating parts ..and--. stuffing boxes, freedcnnfrom exterior. andv interior parts .that are! troublesome,

inaccessible. oryobstructive under. certain COD-d1.-

relationship: :asmore=particu1ar1y defined by the hereto .appended: claims. i

In .;the vdnaw-ingszr Figured is-..an' end elevational. view ofxmyl novel strainen-unitw-ithithe; casin-g..-partlyhroken away toishowz cer-tainsinterior parts.

Fig; 2V is. a central. sectional .elevational. view taken substantiallyd'as indicated by.the--anro.ws 2--2 on-:-Fig":w1.

Fig.1 3 is .a sectional elevationahview .takensub stantially. as. indicated by a-thev arrowsMfi-t on Fig. 2.

Figmi is: a. planwiew pitta: novel. movable' ior rotatable valve .membcr. forming 1 part on; my invention:

Fla-15 is a central:se.ction-al..view-of the-valve member. shown. in i Fig. :4; as seen by looking in the direction of the. arrows 5,--5. onthe lattes.

Fig. Gis-a centrairplan sectional view taknsubistantially as --.indical:ed bit :the Narrows. .li+--6 ion mp 7. isha tpartialwsectional elevatinnal .fvielw taken substantially as .-indic.ated. .by .the arrows I- L on .Fig. 1.6.

Fig. 8 1. is.. an enlarged. fragmentarysectional view of certain partst-asfldisclosedt in .eFig'afi, and more clearly showsxthe...connection .details' of. the valve. member, actuator therefor. and-.shaft end located: adjacent. .to. the. outlet. passage ..of.. .lthe strainer. unit; and

Fig. 9 isiairagmentary plan. view oil-the outlet end of thestrainer. unit, and disciosesvthe visual indicator. associated with; the: .valve operating means. otimv, invention. .which is; arranged; to point to,..the. sidenot-Hthefiunit-where thevaliz'e membersare .in' .open position.

The novel strainer mutant-tin invention. gen.-

. erally, comprises.uamcasingw I0, having. an.-.in1'e't circular "aperture: invtheitop. oi the casing. pro.-

vided, to. permit rembvai and. replacement I. of the strainerelements. I5 "whenever desired. The said circular apertures. arenormally' closed!- byatwo lids l. or covers. I63 and IT "secureditdthecasin'gh In ,by. suitable means, such Jae-bolts. 19'. 'T

on .the inside. 20f the, casing.; 101 .are integrally formed. .transuerse. partitions (2.1. andml22'. which serve as. .endiwallsifor. the: chambers. 1.1. andaldi The partition: 2 I. has. providedthenein. twntsuh- .stantiallytasemi-circular. apertures. I32 anch-Me which serve as inlet ports; for the .chambers. 43 -.and-1 l -andtthe partition 22, ,directly opposite to or :in alignmentiwith theraperturesa' 1 S and M ris provided: withuapertures 43 and .i4 '--whichie0rre.- spondin size and shape Withtha apertures: t3?

3 and l4 and serve as outlet ports for the chambers l3 and M.

The chambers 13 and M are centrally divided by a vertically extending partition or wall 23 which is also integrally formed with the casing ID. The upper portions of the chambers i3 and I4, intermediate their inlet ports 13 and I l and their respective strainer basket l5, are provided with passages arranged to direct theliquid entering the inlet ports :l3 ifand-M into a suitable opening l provided in each of the baskets l5. The said passages are similarly formed by wall sections adjacent to the partition 21, and in the chamber l3 include a curved vertically and horizontally extending wall section 24 and two vertically extending wall sections 25 and 26, and in the chamber M a similar arrangement of a curved vertically and horizontally extending wall section 21, and two vertically extending wall sections 28 and 29.

Centrally formed in the wall 23 is a longitudiplied to the screw threaded portions of the ends of the shaft 3|, as clearly shown in Fig. 8.

' Seated on the outside of each of the hubs of the valve actuators 32-and 33, is-a circular valve member, plate, or disk 35, such as shown in Figs. 4 and 5. Each valve member 35 is provided with a central aperture 35* of slightly greater diameter than the outside diameter of the hubs of actuators .32 and 33, a substantially semi-circular valve opening 35 which corresponds in shape and size with the inlet ports [3, I4, and outlet ports 13 114 of the chambers l3 and I4; and an integral lug or extension 35 arranged to extend through a connecting notch or aperture provided therefor in the actuator on which the valve plate is mounted, and having arounded tip adapted to cooperate with one of'two pairs of oppositely arranged cam elements 36, integrally formed on the inside of the end walls of the casing ID.

V The parts just described are arranged so that the shaft 3|, actuators 3'2 and 33, and the two lvalve members 35, are selectively rotatable in unison in both directions through an arc of 180 degrees. At each 'end of such movement, the valve apertures 35 of the members 35, are in registry with the inlet and outlet ports of one of the chambers l3 or M. The cam elements 36 are so located in the path of travel of the valve lugs 35, that as the valve members 35 are selectively moved to completely open the inlet and outlet ports of one of the chambers I3 or M, the tips or lugs 35 of the two members 35 will each encounter one of the cam elements 36 and move upwardly on the inclined edge thereof during the final increment of rotary movement of the valve members 35, and this action will tend to shift the members 35 axially along the hubs of actuators32 and 33, so as to press them tightly against their respective valve seating surfaces. The circular fiat rim the initial increment of rotary movement will cause the tips of lugs 35 to slightly move down the inclined surfaces of the respective cam elements 36 with which they are engaged, and this will immediately release the valve members 35 for free and easy rotary movement. This free movement will continue until the point is reached where the lugs 35 of each of the two valve members 35 ride up and are stopped by the other two opposed cam elementsf36 at the end of the degree rotary movement of the valve members 35, when the latter are again pressed against their valve seats as before.

In accordance with well-known practice, each of the valve members 35 may, if desired, also be provided with gasket means of rubber, fibrous, or other yieldable material. For example, a flat gasket of such material may be associated with the active side or face of each member 35, and secured thereto in any practical manner, andsuch gasket may be of the same size and configuration as the valve face and have apertures therein corresponding with the valve member apertures 35- and 35 as indicated in dot-and-dash outline by the numeral 50 in Fig. 5. The addition of such yieldable gasket means will obviously increase the previously explained slight axial movement of the valve members 35 when the latter are coacting with the cam elements 35 during the incremental rotary valve looking or releasing movement which takes places at the end or beginning of each selective valve operating action.

The actuator 33 is provided with a bevel gear segment 31 adjacent to its outer perimeter, in

' mesh with a bevel pinion 38 fixed to the end of a shaft 39 extending through a conventional stufilng box 40 adapted to prevent leakage of the liquid from the unit at this point. Fixed to the outer end of the shaft 39 is a hand-wheel 4| adapted to be rotated in both directions to effect selective operation of the valve members 35, through the gear and other connections, as above explained.

The ratio between the bevel gear segment 31 and the bevel pinion 38 may, for example, be in the order of 1 to 5, as shown, so that two and one-half revolutions of the pinion 38 or (handwheel M, will cause rotation of the gear segment 3! through an arc of 180 degrees as required in order that the apertures 35 of the valve members 35 move from one extreme or ultimate selective position of cooperation with the inlet and outlet ports of one of the chambers l3 or H, to that of the other. An indicating device 4|, such as an arrow, on the handwheel 4| will consequently move with the handwheel through two and one-half revolutions when the handwheel is turned from one selective valve setting position to the other, and when the handwheel comes to rest after being rotated in one direction, the arrow 4i will be on one side of the wheel, as shown in Fig. 9, and on the diametrically opposite side when the handwheel is given two and one-half turns in'the opposite direction. In other words, the arrow 4P is arranged so that when the wheel 4| comes to rest at one or the other selective valve setting position, it will point to the side of the unit where the valve members 35 have been moved so that they will completely open the inlet and outlet ports of one of the chambers to per- "mit passage of liquid through the respective chamber and its strainer element. This result can, of course, also be achieved with other gear ratios, such as ratios of 1 to 1, 1 to 3, 1 to '1, etc., and it is consequently to be understood that the plane relationship with their respective 's'afihf or entirely stopped. Furthermore, the t jihEifingl m fegs as, 70*

gar

mire

the inlet and outletports of oneof said chambers" while "the valve member'por'tions opposite to said apertures will effect closing of the. inlet and outlet portsof the other chamber.

,2. A liquidstrainer unit of the character describedcomprising: a, unit casing having a maini.

inlet and a main outlet opening; a vertically extending wall centrally located within the casing outlet port; a strainer element removably seated in each of said chambers between the inlet andv outlet ports thereof so as to effect straining of the,

liquid flowing through the chambers; a disc-like valve member arranged to be rotatably. seated against said front wall sections of the chambers in overlapping relationship with 'respect to the two chamber inlet ports, which member is provided with an aperture adapted to be brought into'registry with one or the other of said inlet ports by rotary movement of the valve member;

a disc-like valve member arranged to be rotata bly seated against said rear wall sections of the chambers in overlapping relationship with re-' spect to the two chamber outlet ports; which member is provided'with an aperture adapted to be brought into registry with one or the other of said outlet ports by rotary movementof the valve member; a shaft rotatably mounted within the casing on which the-valve members are con-- centrically supported in such manner as to maintain them in said seated relationship with the apertures thereof positioned in alignment relative to each other; means connecting. the shaft and valve members to effect rotary movement thereof in unison; and means adapted to impart rotary movement to the shaft so that the-aligned apertures of the valve members will effect open--;

ing of the inlet and outlet ports of one of said chambers while the valve member portions opposite to said apertures will effect closing of the.

inlet and outlet ports of the other chamber. i

a. A liquid strainer unit of the character-Ide l scribed comprising: a unit casing having a main;

inlet and a main outlet opening; a verticallyex tending wall centrally located within the casing in axial alignment with said inlet and outlet openings and arranged to form a common dividing wall between two similar juxtaposed chambers each having a front wall section spacedly positioned adjacent to said main inlet opening in overlapping relationship with respect to the.

two chamber inlet ports, which member is provided with an aperture adapted to be brought into registry with one or the other of said inletports by rotary movement of the ,valve member; a

disc-like valve member arranged to be rotatably seated against said rear wall sections of the chambersin overlapping relationship with respect to the two chamber outlet ports, which member is provided with anaperture adapted to be brought into registry with one or the other of said outlet ports by rotary movement of the valve member; a shaft rotatably mounted within the casing 'on which the valve members are concentrically supported in such manner as to maintain .them in said seated relationship with the apertures thereof positioned in alignment. rela-' tive to each other; mean connecting the shaft and valve members to effect rotary movement thereof in unison; a gear segment secured to said shaft; a pinion in mesh with said gear segment; a shaft on which said pinion is mounte'd,'

which shaft extends through the unit casing; andmeans secured to the latter shaft on the outside of the unit casing for effecting rotation thereof. a

4. A'liquid strainer unit of the character described comprising: a unit casing having'a main inlet and a main outlet opening; a vertically extending wall centrally located within the casing infaxial alignment with said inlet and outlet openings and arranged to form a common dividing wall between two similar juxtaposed chambers each having a front wall section spacedly positioned adjacent to said main inlet opening which wall section is provided with a chamber inlet port, and a rear wall section spacedly positioned adjacent to said main outlet opening which wall section is provided with a chamber outlet port; a strainer element removably seated ineach of said chambers between the inlet and outlet ports thereof so as to effect straining of the liquid flowing through the chambers; a disclike valve member arranged to be rotatably seated against said front wall sections of the chambers in overlapping relationship with respect to the two chamber inlet ports, which member is provided with an aperture adapted to be brought into registry with one or the other of saidinlet ports by rotary movement of the valve member; a 'disc-like valve member arranged to.

be rotatably seated'against said rear wall sections of the chambers in overlapping relationship with re'spectto the two chamber outlet ports, which member is provided with anaperture adapted to bebrought into registrywith one or the other of said outlet ports by rotary movement of the valve member; a shaft rotatably mounted within the casing; two separate elements each respectively secured to one end of said shaft, which elements are provided with hubs on which the valve members are concentrically supported in such manner'as tomaintai'n them in said seated relation ship with the apertures thereof positioned in alignment relative to each other; means connect-v ing said elements andvalve members to effect rotary movement thereof in unison';.means cononev of said chambers while the valve member portions opposite to said apertures will effect closing ofthe inlet and outlet ports of the other chamber. 7

"5. A liquid strainer unit of the character describedcomprising: a unit casing having a maininlet and a main outlet opening; a vertically extending wallcentrally located within the casing,

in. axial alignment .with said inlet and outlet openings and arranged to form a common di viding wall between two similar juxtaposed chambers each having a front wall section spacedly positioned adjacent to said main inlet opening which wall section is provided with a chamber inlet port, and a rear wall section spacedly positioned adjacent to said main outlet opening which wall section is provided with a chamber outlet port; a strainer element removably seated in each of said chambers between the inlet and outlet ports thereof so as to effect straining of the liquid flowing through the chambers; a disclike valve member arranged to be rotatably seated against said front wall sections of the chambers in overlapping relationship with respect to the two chamber inlet ports, which member is provided with an aperture adapted to be brought into registry with one or the other of said inlet ports by rotary movement of the valve member; a disclike valve member arranged to be rotatably seated against said rear wall sections of the chambers in overlapping relationship with respect to the two chamber outlet ports, which member is provided with an aperture adapted to be brought into registry with one or the other of said outlet ports by rotary movement of the valve member; a shaft 0 rotatably mounted within the casing; two semicircular elements that are respectively secured to the ends of said shaft, which elements are provided with hubs on which the valve members are concentrically supported in such manner as to maintain them in said seated relationship with the apertures thereof positioned in alignment relative to each other; a notch formed in each of said semi-circular elements; an integral projection extending laterally from each of the valve members through and beyond the notch of the elements; movement limiting means on the inside of said unit casing arranged to be engaged by said valve member projections and positioned to effect stopping of the valve members when the apertures thereof are in registry with the ports of one or the other of said chambers; means connecting the shaft and elements to effect rotary movement thereof in unison; and means adapted to impart rotary movement to the shaft so that the aligned apertures of the valve members will effect opening of the inlet and outlet ports on one of said chambers while the valve member portions opposite to said apertures will effect closing of the inlet and outlet ports of the other chamber.

6. A liquid strainer unit of the character described comprising: a unit casing having a main inlet and a main outlet opening; a vertically extending wall centrally located within the casing in axial alignment with said inlet and outlet openings and arranged to form a common dividing wall between two similar juxtaposed chambers each having a front wall section spacedly positioned adjacent to said main inlet opening which wall section is provided with a chamber inlet port, and a rear wall section spacedly positioned adjacent to said main outlet opening which wall section is provided with a chamber outlet port; a strainer element removably seated in each of said chambers between the inlet and outlet ports thereof so as to effect straining of the liquid flowing through the chambers; a disc-like valve member arranged to be rotatably seated against said front wall sections of the chambers in overlapping relationship with respect to the two chamber inlet ports, which member is provided with an aperture adapted to be brought into registry with one or the other of said inlet ports by rotary movement of the valve member; a disclike valve member arranged to be rotatably seated against said rear wall sections of the chambers in overlapping relationship with respect to the two chamber outlet ports which member is provided with an aperture adapted to be brought into registry with one or the other of said outlet ports by rotary movement of the valve member; a shaft rotatably mounted within the casing; two separate elements each respectively secured to one end of said shaft, which elements are provided with hubs on which the valve members are concentrically supported in such manner as to maintain them in said seated relationship with the apertures thereof positioned in alignment relative to each other and so that the valve members are limitedly slidable on the element hubs in an axial direction; means connecting said elements and valve members to eifect rotary movement thereof in unison; means connecting the shaft and elements to effect rotary movement thereof in unison; an integral projection extending laterally from each of the valve members; cam means on the inside of said unit casing adapted to be engaged by the tips of the valve member projections at the end of the rotary movement of the valve members in either direction, which cam means is adapted to effect sliding movement of the valve members on the hubs of the elements during the final increment of rotary movement of the valve members, thereby to sealingly press the latter against their seating surfaces; and means adapted to impart rotary movement to the shaft so that the aligned apertures of the valve members will effect opening of the inlet and outlet ports of one of said chambers while the valve member portions opposite to said apertures will effect closing of the inlet and outlet ports of the other chamber.

GEORGE L. MACNEILL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,042,203 Dahl Oct. 22, 1912 1,068,743 Dahl July 29, 1913 1,187,046 De Lamarter June 13, 1916 1,721,233 Royle July 16, 1929 2,173,492 Lidiak Sept. 19, 1939 2,237,684 Moore Apr. 8, 1941 2,365,074 Harvuot Dec. 12, 1944 FOREIGN PATENTS Number Country Date 207,588 Great Britain Nov. 26, 1923 699,915 Germany Dec. 11, 1940 

